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441821 (2009 OW12)
Classification: Main-belt Asteroid          SPK-ID: 2441821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2890285452404593 5.1395e-08  
a 3.19527066978504 5.1468e-08 au
q 2.271746236447562 1.7215e-07 au
i 21.2494291694615 1.0067e-05 deg
node 298.1637720039386 2.2826e-05 deg
peri 117.198889403927 3.5071e-05 deg
M 267.8279788359346 2.623e-05 deg
tp 2459534.641739432158
(2021-Nov-16.14173943)
0.00015852 TDB
period 2086.219047462359
5.71
5.0406e-05
1.38e-07
d
yr
n .1725609784063173 4.1693e-09 deg/d
Q 4.118795103122518 6.6344e-08 au
  Orbit Determination Parameters
   # obs. used (total)      212  
   data-arc span      7965 days (21.81 yr)  
   first obs. used      1998-09-23  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6061  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:52:14  

Additional Information
 Earth MOID = 1.36537 au 
 Jupiter MOID = 1.58843 au 
 T_jup = 3.027 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8   n/a MPO397575  
diameter diameter 4.492 km 1.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.042   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

441821 (2009 OW12)          Discovered 2009-Jul-27 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

[ show close-approach data ]
Alternate Designations
 2009 OW12 = 1998 SL27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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